About this playlist

Napster turns 10 years old this month, and in celebration we've crunched the numbers and determined our 15 most popular songs for every year we've been alive. Here are our findings.

A humble young man named Flo Rida leads our charge this time, with the most enduring and infectious of all dancefloor directionals: low low low low low low low low. The club was crowded this year, what with Usher constantly trying to make love in it, Soulja Boy inventing new dances (and memes, and careers), Rihanna shouting out a popular Shia LaBeouf movie, and Chris Brown enjoying ... simpler times. Katy Perry's bi-curious bow is the most seismic debut in retrospect, though Leona Lewis clearly has her fans. M.I.A. and Lil Wayne both hit the pop charts, inexplicably and wonderfully. And let us not forget possibly Coldplay's catchiest hour, saluting some regime change or another.